Question

Which of the following is true regarding the selectivity filter of the bacterial potassium channel? 1. The channel has a conserved sequence of amino acids. 2. The amino acids in the channel create 5 rings of oxygen atoms. 3. The size of the channel fits a hydrated potassium ion. 4.8 oxygen atoms can intąract with a single potassium ion. 5.4 ions fit inside the channel at one time. 1,2,3,4,5 1,2,4 1,3,5 • 1.4

Answer 1

1,3,5

The channel has a conserved sequence of amino acids

The size of the channel fits a hydrated potassium ion

4 ions fit inside the channel at one time